The slope is 1/3 because in order to get from point (3,1) to (6,2) you need to rise 1 and go over 3
Paralell to 2x+y=-5
means it has same slope
means it is in form
2x+y=c where we have to find c
convert to slope intercept
minus 2x both sides
xint of 2
xint is where th eline crosses the x axis or where y=0, x=2
2(2)+0=c
2(2)=c
4=c
the equation is 2x+y=4
Slope of the line
(3-(-5)) / (-5-(-1))
8 / -4
-2
Idk if this will help, but her :)